IF_NAMETOINDEX(3) Library Functions Manual IF_NAMETOINDEX(3)

if_nametoindex — map a network interface name to its corresponding index

#include <net/if.h>

unsigned if_nametoindex(const char *ifname);

The if_nametoindex () function shall return the interface index corresponding to name ifname.

The corresponding index if ifname is the name of an interface; otherwise, zero.

No errors are defined.

None.

None.

None.

None.

getsockopt(3), if_freenameindex(3), if_indextoname(3), if_nameindex(3), setsockopt(3), the Base Definitions volume of IEEE Std 1003.1-2001 (“POSIX.1”), <net/if.h>

First released in Issue 6. Derived from the XNS, Issue 5.2 specification.

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January 1, 2004 posix.fail